Low had been expected to announce a decision after a national team coaches meeting that ended on Wednesday but the coach told the German Football Federation (DFB) website that it will now come at the end of April.
Low had pledged never to recall the Schalke 04 striker after he stormed out of a World Cup qualifier against Russia in late 2008 when dropped from the squad.
Kuranyi's impressive form and his goal tally have brought him back into contention, Low had said before the meeting.
"I am fully aware of my responsibility as national team coach but we will not be forced into a decision by public pressure," he said on www.dfb.de.
Schalke coach Felix Magath criticised Low's delay.
"I think it is good that the coaching staff sat down for three days and then decided to wait a little longer," Magath sarcastically told reporters on Thursday.
"If (Low) cannot decide after 30 match-days then we just have to wait until the 34th (final) match-day."
